Patent GB-668035-A (GB)
Abstract: 668,035. Accounting-machines. NATIONAL CASH REGISTER CO. May 22, 1950 [July 1, 1949], No. 12726/50. Class 106 (i). A cash register or accounting-machine, with provision for impressing data on an inserted voucher, has means which lock the machine against further operation whilst an impressed voucher remains in the machine. With the machine shown, the voucher is the receipt portion of an income-tax form held by the taxcollecting office; both the form and voucher are inserted into the machine for impression, and the machine is locked against release unless the previously impressed voucher has been removed and a new form and voucher inserted. The data is set up on differential amount levers, and typewheels 117, 118 and 119, for printing respectively on the voucher, an audit-tape and the form, are adjusted correspondingly by gears 116 connected by nested tubes 115 with further gears in mesh with gear segments on the amount levers. A totalizer is also actuated by the amount levers through the mechanism described in Specification 660,632. Machine release. Depression of a motor bar 75 (Fig. 5) cams a lever 84 clockwise and a connected arm 86 on the machine release shaft 87 counterclockwise. This clears a lug 91 on the arm 86, and a lug 92 on the motor bar from a three-armed lever 88, which is thereupon rocked counterclockwise, about its pivot 89, by a spring 98. An upper extension 93 of the lever 88 then latches over the lug 92 of the motor bar to hold it down, and a connected arm 95 rocks a shaft 96 to clear a stop arm 67 from the usual one-revolution clutch in the motor drive and close the motor switch. Towards the end of the machine cycle, a pin 100 on a gear 101 on the main shaft 31 restores the three-armed lever 88 so releasing the motor bar for return by its spring 81. The three-armed lever is then retained by the arm 86, returned with the motor bar, and by the lug 92 on the motor bar. Non-repeat mechanism. If the motor bar is held depressed at the end of a cycle, a pawl 106, pivotally mounted on the three-armed lever 88, abuts the motor bar lug 92. This prevents counterclockwise release movement of the three-armed lever until the motor bar is released and re-depressed, whereupon the lug 92 engages over the pawl 106 and rocks it clear as in normal operation. Machine release control by inserted form and voucher. The form is inserted over a table 180 (Fig. 1) for impression by the type-wheels 119. As the form is inserted, it depresses a spring- projected feeler 200 to clear a stop-arm 204 from a pin 205 on an arm 206 secured to the machine release shaft 87 which, in the absence of the form, is held against release by the stoparm 204. The release shaft 87 is also connected, through linkage 105, 214 and 215 (Figs. 1 and 2), with an arm 219 pivoted at 220. A latch 213, pivoted at 223, normally engages under a finger 221 of the arm 219 to lock the arm and release shaft 87. The voucher is inserted into a pocket 212 and rocks the latch 213 clockwise, so freeing the arm 219 and release shaft. If the voucher is left in the pocket after the machine operation, further release of the machine is prevented, despite the latch 213 remaining clear of the arm 219, by the engagement of an interponent 231 behind a depending finger 233 on the arm 219. This interponent is pivoted at 230 on the latch 213 and is rocked into effective position, towards the end of the-machine operation, by a cam 235. Removal of the voucher releases the latch 213 which returns to normal (Fig. 2) and withdraws the interponent 231 from between the cam 235 and finger 233. The mechanism is then conditioned for release by the insertion of another voucher, the interponent 231 then clearing the point of the cam 235 by means of a notch 234 in its end, and so remaining clear of the arm 233 and ineffective. Printing mechanisms. An impression hammer 185 for the inserted forms is pivoted at 186 and actuated by a cam 188 on a shaft 178. A second cam 195 on the shaft 178 releases a pair of clamping arms 190 to the action of a spring 192 to grip the form against a guard 193 over the table 180 during printing. The voucher impression hammer 240 is rocked about its pivot 241 by means of a cam 242. The audit tape 145 is impressed by a spring-retracted hammer 170 thrust forward by a cam 174. The audit tape passes from a supply roll 146, round guide rollers 148 and before the type wheels 118 to a take-up spool 151 rotated step-wise by engagement of an arm 154, driven from the main shaft, with a ratchet-wheel 150 fast with the spool. An aligning pawl 160 engages both faces of successive teeth of the ratchet-wheel to ensure accurate line feed.